Where does “leftover” come from?

Leftover comes from English left and over, with over deriving from Middle English over, Old English ofer, Proto-Germanic ubér, and Proto-Indo-European upér, ultimately from the root meaning to go up or over.

leftover (English): Remaining; left behind; extra; in reserve;...

Definitions

  1. Remaining; left behind; extra; in reserve;...

Ancestry of “leftover”, step by step

leftover traces back through two separate lines of ancestry.

via English left

StepLanguageWordMeaning
1EnglishleftThe opposite of right; toward the west when one...
2Middle Englishleft
3Middle Englishlaftpast participle of leave
4Old Englishlæfd
5Old Englishlǣfanto leave
6Frankishlaibijanto leave; to leave behind
7Proto-Germaniclaibijanąto leave behind, to leave remaining
8Proto-Germaniclībanąto remain, to be left
9Proto-Indo-Europeanleyp-to stick; fat or sticky substance
10Proto-Indo-Europeanlēy-to leave, let; to want, desire; to let; leave...

via English over

StepLanguageWordMeaning
1EnglishoverDiscontinued; ended or concluded; Thoroughly;...
2Middle Englishoverriverbank, seashore, brink
3Old Englishōferriverbank, seashore, brink, edge, margin, border
4Proto-West Germanicobarover, above
5Proto-Germanicuberover; over, above
6Proto-Indo-Europeanupérabove; over
7Proto-Indo-Europeanupóunder, below
8Proto-Indo-Europeanh₃ewp-
Every word from Proto-Indo-European lēy-
leftover — Etymology, Origin & Word History | Etymology Explorer